不同焊接方法下1J50合金与0Cr18Ni9不锈钢焊接接头组织与性能研究  

Microstructure and Properties of 1J50 and 0Cr18Ni9 Welding Joints under Different Welding Methods

作　　者：褚巧玲[1] 曹齐鲁 谢志刚[2] 杜治 曹凯 常哲 CHU Qiaoling;CAO Qilu;XIE Zhigang;DU Zhi;CAO Kai;CHANG Zhe(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China;Xi'an Flight Automatic Control Research Institute,Xi'an 710054,China;Xi'an Yitong Thermal Technology Service Co.,Ltd.,Xi'an 710032,China;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]西安飞行自动控制研究所,西安710054 [3]西安益通热工技术服务有限责任公司,西安710032 [4]西安热工研究院有限公司,西安710054

出　　处：《焊管》2023年第10期21-27,共7页Welded Pipe and Tube

基　　金：国家自然科学青年基金“合金组元+熔-钎焊耦合调控的钛/铜/钢爆炸复合板对接焊缝冶金结合机理研究”(项目编号51904243);陕西省自然科学基金陕西煤炭联合基金项目“煤矿大型设备再制造绿色成形技术及智能装备研究”(项目编号2021JLM-08)。

摘　　要：采用冷金属过渡技术(CMT)、冷焊、激光焊将1J50软磁合金与0Cr18Ni9奥氏体不锈钢进行焊接,研究该焊接接头组织、元素分布以及力学性能。结果表明,激光焊焊点明显小于CMT、冷焊工艺;三种焊接方法都未出现气孔、裂纹等缺陷且热影响区宽度均较小;冷焊、激光焊的焊接接头沿1J50母材-焊缝-0Cr18Ni9母材方向,Fe元素含量呈上升趋势,Ni、Cr元素交替分布,而CMT焊缝中三种元素分布均匀;三种焊接方法获得的接头显微硬度差异较大,CMT焊接接头显微硬度高于冷焊和激光焊焊接接头显微硬度,拉伸时所有试样均在焊缝处发生断裂。1J50 soft magnetic alloy and 0Cr18Ni9 austenitic stainless steel were welded by cold metal transition technology(CMT),cold welding and laser welding.The microstructure,element distribution and mechanical properties of the welded joints were investigated.The results show that the welding spot of laser welding is significantly smaller than that of CMT and cold welding.There are no defects such as pores and cracks in the three welding methods,and the width of the heat affected zone is small.In the cold welding and laser welding joints,along the direction of 1J50 base metal-weld-0Cr18Ni9 base metal,the Fe element shows an upward trend and the Ni and Cr elements are alternately distributed,while the three elements are evenly distributed in the CMT weld.There is a significant difference in the microhardness of the joints obtained by the three welding methods.The microhardness of CMT weld was higher than that of cold welding and laser welding.All samples were fractured at the weld during stretching.

关 键 词：异种材料 焊接接头 组织 合金元素分布 力学性能 

分 类 号：TG113.26[金属学及工艺—物理冶金]